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WO2019163999A1 - Dispositif de traitement d'image, dispositif d'affichage, procédé de traitement d'image, programme et support d'enregistrement - Google Patents

Dispositif de traitement d'image, dispositif d'affichage, procédé de traitement d'image, programme et support d'enregistrement Download PDF

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Publication number
WO2019163999A1
WO2019163999A1 PCT/JP2019/007131 JP2019007131W WO2019163999A1 WO 2019163999 A1 WO2019163999 A1 WO 2019163999A1 JP 2019007131 W JP2019007131 W JP 2019007131W WO 2019163999 A1 WO2019163999 A1 WO 2019163999A1
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WO
WIPO (PCT)
Prior art keywords
video processing
processing unit
backlight
video
area
Prior art date
Application number
PCT/JP2019/007131
Other languages
English (en)
Japanese (ja)
Inventor
貴行 村井
涼二 櫻井
吉山　和良
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to CN201980012417.0A priority Critical patent/CN111801724A/zh
Priority to US16/968,997 priority patent/US20210027724A1/en
Priority to JP2020501090A priority patent/JPWO2019163999A1/ja
Publication of WO2019163999A1 publication Critical patent/WO2019163999A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/08—Power processing, i.e. workload management for processors involved in display operations, such as CPUs or GPUs

Definitions

  • This disclosure relates to a video processing device and the like.
  • Patent Document 1 discloses an example of a video processing apparatus that performs processing such as color correction on input video data.
  • the input video is divided into a plurality of regions, and processing is performed on each region by the plurality of video processing devices.
  • the plurality of video processing apparatuses output backlight control data for controlling the backlight area corresponding to the area to be processed. For this reason, it becomes necessary to additionally mount a function for integrating backlight control data output from a plurality of video processing devices, thereby increasing the manufacturing cost of the video processing device.
  • An object of one embodiment of the present disclosure is to realize a video processing apparatus that can reduce manufacturing costs.
  • a video processing device in a display device including a backlight having a plurality of divided regions, and is a partial region of an input video.
  • a first video processing unit that performs video processing on a partial video region; and a second video processing unit that performs video processing on a region different from the partial video region, wherein the first video processing unit is configured to divide the backlight.
  • the control data for controlling the area is transmitted to the backlight, and the divided area of the backlight controlled by the control data transmitted by the first video processing unit and the partial video to be processed by the first video processing unit This is different from the divided area of the backlight corresponding to the area.
  • a video processing method is a video processing method by a video processing device in a display device including a backlight having a plurality of divided regions, and the video processing device includes a part of an input video.
  • a first video processing unit that performs video processing on a partial video region that is a region, and a second video processing unit that performs video processing on a region different from the partial video region, the first video processing unit and the second video processing unit each of the above image processing section, and the image processing step of performing image processing on the partial image area is its own to be processed, the first image processing unit, control data for controlling the divided areas of the backlight
  • a control data transmission step for transmitting to the backlight, and a divided region of the backlight controlled by the control data transmitted by the first video processing unit,
  • the above backlight divided areas corresponding to the partial image area is one image processing unit to be processed differently from each other.
  • the manufacturing cost of the video processing device can be suppressed.
  • FIG. 3 is a block diagram illustrating a configuration of a main part of the display device according to the first embodiment.
  • 1 is a block diagram illustrating a configuration of a display device according to Embodiment 1.
  • FIG. It is a flowchart which shows the flow of the process in a 1st video processing part and a 2nd video processing part. It is a figure which shows the local dimming process in the display apparatus of a comparative example.
  • 6 is a diagram showing local dimming processing in the display device according to Embodiment 1.
  • FIG. 1 is a block diagram illustrating a configuration of a display device according to Embodiment 1.
  • FIG. It is a flowchart which shows the flow of the process in a 1st video processing part and a 2nd video processing part. It is a figure which shows the local dimming process in the display apparatus of a comparative example.
  • 6 is a diagram showing local dimming processing in the display device according to Embodiment 1.
  • (A) is a figure which shows an example of an input image
  • (b) is a figure which shows the 1st area
  • (c) is a figure which shows the control data which a control data calculation part calculates.
  • (d) is a diagram showing the second area of the input video
  • (e) is a diagram showing the control data calculated by the control data calculation unit
  • (f) is a diagram showing the diffusion of the luminance of the LED.
  • (G) is luminance distribution data based only on the luminance of the LEDs in the first region
  • and (h) is luminance distribution data based only on the luminance of the LEDs in the second region.
  • 6 is a block diagram illustrating a configuration of a display device according to Embodiment 2.
  • FIG. (A) is a figure which shows the example of board
  • (b) is a figure which shows the structure of an example of a display apparatus in the case of increasing the division area number of a backlight
  • (c) is a figure which shows the example of board
  • (d) is a figure which shows the example of board
  • FIG. (A) is a figure which shows the example of the wiring in an example of the display apparatus shown to (d) of FIG. 8,
  • (b) is the wiring in another example of the display apparatus shown in (d) of FIG. It is a figure which shows the example of.
  • FIG. 10 is a diagram illustrating a configuration of a main part of a display device according to a fourth embodiment.
  • FIG. 10 is a diagram illustrating a configuration of a main part of a display device according to a fifth embodiment.
  • FIG. 10 is a diagram illustrating a configuration of a main part of a display device according to a sixth embodiment.
  • Embodiment 1 the display device 1 (video processing device) according to an embodiment of the present disclosure will be described in detail.
  • the display device 1 generates and displays an output video for display by itself.
  • members having the same functions as those described in Embodiment 1 are denoted by the same reference numerals, and the description thereof is not repeated.
  • Display device 1 displays one 8K4K video (video having 8K4K resolution).
  • 8K4K means a resolution of “the number of horizontal pixels 7680 ⁇ the number of vertical pixels 4320”.
  • 8K4K is also simply referred to as “8K”.
  • 4K2K means a resolution of “the number of horizontal pixels 3840 ⁇ the number of vertical pixels 2160”.
  • One 8K4K video can be expressed as a video composed of four (two in the horizontal direction and two in the vertical direction) 4K2K video (video having a resolution of 4K2K). That is, one 8K4K video can be expressed by combining four 4K2K videos.
  • “4K2K” is also simply referred to as “4K”.
  • 4K4K means a resolution of “the number of horizontal pixels 3840 ⁇ the number of vertical pixels 4320”.
  • one 4K4K video (video having a resolution of 4K4K) can be configured.
  • one 8K4K video can be configured by arranging two 4K4K videos in the horizontal direction.
  • the input video is assumed to be composed of four areas (divided video areas) of areas A, B, C, and D. Specifically, when the input video is divided into two vertically and horizontally, the area A is the upper left area in the input video, the area B is the upper right area in the input video, and the area C is the lower left area in the input video. It is assumed that the region D is a lower right region in the input video. In the following description, the input video is divided into areas A to D or areas obtained by combining them. The input video has a resolution of 8K, and the areas A to D each have a resolution of 4K.
  • FIG. 2 is a block diagram showing a configuration of the display device 1 according to the present embodiment.
  • the display device 1 includes a display panel 109, a backlight 110, and a video processing device 99.
  • the video processing device 99 includes a first video processing unit 10, a second video processing unit 20, a video input unit 101, a control unit 102, a storage unit 103, as shown by a broken line area in FIG. Storage units 104 and 105.
  • the control unit 102, the storage unit 103, and the storage units 104 and 105 may be provided outside the video processing device 99.
  • the display device 1 further includes a bus 106 and TCON (Timing Controller) 107 and 108.
  • TCON Transmission Controller
  • the first video processing unit 10 and the second video processing unit 20 perform video processing on a partial video area that is a partial area of the input video.
  • the first video processing unit 10 targets areas A and C
  • the second video processing unit 20 targets areas B and D. That is, the first video processing unit 10 performs video processing on a partial video region that is a partial region of the input video
  • the second video processing unit 20 is different from the partial video region that is the processing target by the first video processing unit 10.
  • each of the first video processing unit 10 and the second video processing unit 20 controls, for a partial video region that is a processing target of the first video processing unit 10 and the second video processing unit 20, a divided region of the backlight 110 corresponding to the partial video region. Generate data.
  • the flow of control data is indicated by thick arrows.
  • the first video processing unit 10 and the second video processing unit 20 transmit and receive the calculated control data to and from each other via the bus 106 and the control unit 102. Further, the first video processing unit 10 transmits control data to the backlight 110. More specific configurations of the first video processing unit 10 and the second video processing unit 20 will be described later.
  • the video input unit 101 transmits the video signal of the input video to the first video processing unit 10. That is, the first video processing unit 10 receives both the left half data and the right half data of the input video from the video input unit 101. The first video processing unit 10 further transmits data of the right half area of the input video to the second video processing unit 20. Accordingly, the first video processing unit 10 can process the left half area of the input video, and the second video processing unit 20 can process the right half area of the input video.
  • the video input unit 101 divides the input video into a left half and a right half so as to transmit the video data of the processing target area to each of the first video processing unit 10 and the second video processing unit 20.
  • a video dividing unit (not shown) may be provided.
  • the video input unit 101 inputs data of the left half of the input video to the first video processing unit 10 and inputs data of the right half of the input video to the second video processing unit 20.
  • the video input unit 101 may be configured to transmit the video signal of the entire input video to each of the first video processing unit 10 and the second video processing unit 20.
  • each of the first video processing unit 10 and the second video processing unit 20 processes half the area of the input video, and discards the video signal in the area not to be processed.
  • the control unit 102 is a control unit that comprehensively controls the operation of the display device 1.
  • the control unit 102 is connected to the first video processing unit 10, the second video processing unit 20, and the storage units 103 to 105 via the bus 106.
  • Storage units 103 to 105 store data related to control by the control unit 102, the first video processing unit 10, and the second video processing unit 20, respectively.
  • the storage units 104 and 105 store control data for controlling the brightness of the LEDs included in the backlight 110, which will be described later, for example.
  • the TCON 107 acquires display data to be displayed on the display panel 109 from the first video processing unit 10.
  • the TCON 108 acquires display data from the second video processing unit 20.
  • the TCONs 107 and 108 convert the format of the acquired display data so as to be suitable for display on the display panel 109. Further, TCONs 107 and 108 transmit the display data after the format conversion to the display panel 109.
  • Display panel 109 displays the output video based on the display data received from TCONs 107 and 108.
  • the display device 1 includes a liquid crystal panel as the display panel 109.
  • the display panel 109 includes a plurality of pixels (not shown) and a display control unit (not shown) that controls light transmittance in the pixels based on display data.
  • the backlight 110 includes a plurality of light emitting units (not shown) that irradiate the display panel 109 with light.
  • the backlight 110 includes an LED (Light Emitting Diode, light emitting diode) as a light emitting unit.
  • the display device 1 displays the output video by the display control unit controlling the transmittance of the light emitted from the backlight 110 through the pixels.
  • the backlight 110 has a plurality of divided areas. Specifically, the backlight 110 has areas corresponding to the areas A to D of the input video described above. In the following description, the area in the backlight 110 may also be referred to as areas A to D.
  • the backlight 110 includes a plurality of light emitting units that irradiate the display panel with light. In the present embodiment, the backlight 110 includes a plurality of LEDs belonging to any of the areas A to D.
  • the backlight 110 also includes a luminance control circuit 111 that drives a plurality of LEDs. In other words, the brightness control circuit 111 controls the brightness of each of the areas A to D.
  • FIG. 1 is a block diagram illustrating a configuration of a main part of the display device 1. Specifically, FIG. 1 is a diagram illustrating a configuration of the first video processing unit 10 and the second video processing unit 20 in the display device 1.
  • the first video processing unit 10 includes a control data calculation unit 11, a data transmission / reception unit 12, a backlight luminance distribution data generation unit 13, and a display data calculation unit 14.
  • the second video processing unit 20 includes a control data calculation unit 21, a data transmission / reception unit 22, a backlight luminance distribution data generation unit 23, and a display data calculation unit 24.
  • the control data calculation unit 11 generates control data for controlling the LEDs included in the areas A and C of the backlight 110 based on the signals of the areas A and C of the input video.
  • the control data calculation unit 21 generates control data for controlling the LEDs included in the regions B and D of the backlight 110 based on the signals of the regions B and D of the input video.
  • the data transmission / reception units 12 and 22 transmit / receive the control data generated by the control data calculation unit 11 or 21 to / from each other.
  • each of the first video processing unit 10 and the second video processing unit 20 acquires control data corresponding to the entire input video.
  • the data transmission / reception units 12 and 22 transmit / receive control data to / from each other via the control unit 102.
  • the transmitted / received data is stored in the storage units 104 and 105, respectively.
  • the data transmitting / receiving unit 12 transmits control data for controlling all of the divided areas of the backlight 110 to the luminance control circuit 111. That is, the first video processing unit 10 transmits the control data to the brightness control circuit 111. By doing so, the divided area (area corresponding to areas A to D) of the backlight 110 controlled by the control data transmitted by the first video processing unit 10 and the part to be processed by the first video processing unit 10 The divided areas of the backlight 110 corresponding to the video area (areas corresponding to the areas A and C) are different from each other.
  • the data transmitting / receiving unit 22 does not transmit the control data to the luminance control circuit 111.
  • the display device 1 may be configured such that the data transmission / reception unit 22 transmits control data to the luminance control circuit 111, and the data transmission / reception unit 12 does not transmit control data to the luminance control circuit 111. That is, the first video processing unit 10 or the second video processing unit may transmit the control data to the luminance control circuit.
  • the backlight luminance distribution data generation unit 13 generates backlight luminance distribution data for the regions A and C based on control data for controlling the LEDs included in the region of the backlight 110 corresponding to the entire video signal. At this time, the backlight luminance distribution data generation unit 13 applies (i) LEDs included in the area of the backlight 110 corresponding to the areas A and C, and (ii) areas of the backlight 110 corresponding to the areas A and C. Reference is made to control data that controls LEDs that are not included and that affect the brightness of the backlight 110 in regions A and C.
  • the backlight luminance distribution data generation unit 13 is more actual than the case where the backlight luminance distribution data is generated by referring only to the control data for controlling the LEDs included in the regions A and C of the backlight 110.
  • the backlight luminance distribution data close to the luminance distribution can be generated.
  • the backlight luminance distribution data generation unit 23 generates the backlight luminance distribution data of the regions B and D based on the control data for controlling the LEDs included in the region of the backlight 110 corresponding to the entire video signal. .
  • the backlight luminance distribution data generation unit 23 applies (i) LEDs included in the area of the backlight 110 corresponding to the areas B and D, and (ii) areas of the backlight 110 corresponding to the areas B and D. Reference is made to control data that controls the LEDs that are not included and that affect the brightness of the backlight 110 in regions B and D.
  • the backlight luminance distribution data generation unit 23 is more actual than the case where the backlight luminance distribution data is generated by referring only to the control data for controlling the LEDs included in the regions B and D of the backlight 110.
  • the backlight luminance distribution data close to the luminance distribution can be generated.
  • the display data calculation unit 14 refers to the backlight luminance distribution data generated by the backlight luminance distribution data generation unit 13, and generates display data for the regions corresponding to the regions A and C of the output video. Display data is the luminance value of each pixel in the output video.
  • the display data calculation unit 24 refers to the backlight luminance distribution data generated by the backlight luminance distribution data generation unit 23, and generates display data for regions corresponding to the regions B and D of the output video.
  • FIG. 3 is a flowchart showing the flow of the video processing method in the first video processing unit 10 and the second video processing unit 20. With reference to FIG. 3, the flow of processing in the first video processing unit 10 and the second video processing unit 20 will be described.
  • the video input unit 101 inputs signals of the regions A to D of the input video to the first video processing unit 10 (S1).
  • the first video processing unit 10 inputs the signals of the regions B and D of the input video to the second video processing unit 20 (S2).
  • each of the first video processing unit 10 and the second video processing unit 20 sets control data for controlling the divided area of the backlight 110 corresponding to the divided video area for the divided video area to be processed.
  • Calculate (S3, control data generation step). Specifically, in the first video processing unit 10, the control data calculation unit 11 calculates control data for the area of the backlight 110 corresponding to the areas A and C. In parallel, in the second video processing unit 20, the control data calculation unit 21 calculates the control data of the area of the backlight 110 corresponding to the areas B and D.
  • the data transmission / reception units 12 and 22 transmit / receive the control data calculated by the control data calculation units 11 and 21 to each other (S4, transmission / reception step).
  • the backlight luminance distribution data generation units 13 and 23 generate backlight luminance distribution data for the area of the backlight 110 corresponding to the entire input video (S5).
  • the display data calculation units 14 and 24 perform video processing on the partial video areas to be processed (S6, video processing step). Specifically, the display data calculation units 14 and 24 calculate display data reflecting the backlight luminance distribution data for the respective partial video regions to be processed. Thereafter, the display data calculation units 14 and 24 transmit the calculated display data to the display panel 109 (S7). Furthermore, the data transmitter / receiver 12 transmits control data for controlling all the divided areas of the backlight 110 to the luminance control circuit 51 (S8, control data transmission step).
  • step S8 described above is not necessarily executed after step S7, and may be executed at any timing after step S4.
  • the backlight 110 is divided into 32 ⁇ 16 areas and the luminance can be controlled for each area.
  • an input video area to be processed by the first video processing unit 10, and a backlight 110 and an output video area corresponding to the area are referred to as a first area.
  • the area of the input video to be processed by the second video processing unit 20, and the backlight 110 and the area of the output video corresponding to the area are referred to as a second area.
  • the first region corresponds to regions A and C
  • the second region corresponds to regions B and D.
  • the backlight 110 the first area and the second area are each divided into 16 ⁇ 16 areas.
  • FIG. 4 is a diagram showing local dimming processing in the display device of the comparative example.
  • the display device of the comparative example is different from the display device 1 in that control data is not transmitted and received between the video processing unit that processes the first region and the video processing unit that processes the second region.
  • the video processing units included in the display device of the comparative example are also referred to as the first video processing unit 10 and the second video processing unit 20.
  • each of the first video processing unit 10 and the second video processing unit 20 sub-sampling processing is performed on an input image including the luminance of (3840 ⁇ 4320) pixels ( A reduced image including the luminance of 160 ⁇ 160) pixels is obtained.
  • the reduced image is divided into (16 ⁇ 16) areas (area size is (10 ⁇ 10) pixels).
  • maximum value data including (16 ⁇ 16) maximum values and average value data including (16 ⁇ 16) average values are obtained. It is done. Then, based on either (i) maximum value data, (ii) average value data, or (iii) weighted average of maximum value data and average value data, the LED luminances of (16 ⁇ 16) areas Is calculated.
  • first backlight luminance distribution data including (80 ⁇ 80) display luminances can be obtained.
  • the correction filter to the first backlight luminance distribution data, the display luminance included in the first backlight luminance distribution data is corrected.
  • second backlight luminance distribution data including (3840 ⁇ 4320) display luminances that is, luminance distribution data of the backlight 110 is obtained. .
  • 3840 ⁇ 4320 pieces of display data are obtained.
  • control data is not transmitted and received between the first video processing unit 10 and the second video processing unit 20.
  • each of the first video processing unit 10 and the second video processing unit 20 has a luminance distribution based only on control data of (16 ⁇ 16) areas that are its processing targets. Calculate the data. In this case, as will be described later, the accuracy of the luminance distribution data is lowered, and there is a possibility that the accuracy of the local dimming itself is also lowered.
  • FIG. 5 is a diagram showing a local dimming process in the display device 1. Next, the local dimming process in the display device 1 will be described. In the first video processing unit 10 and the second video processing unit 20 of the display device 1 as well, the processing until calculating the control data is the same as that of the first video processing unit 10 and the second video processing unit 20 of the comparative example. . As shown in FIG. 5, in the display device 1, after the control data of (16 ⁇ 16) areas is calculated in each of the first video processing unit 10 and the second video processing unit 20, the first video processing is performed. Control data is transmitted and received between the unit 10 and the second video processing unit 20.
  • each of the first video processing unit 10 and the second video processing unit 20 holds the LED control data of the area of (32 ⁇ 16). Accordingly, each of the first video processing unit 10 and the second video processing unit 20 applies (160 ⁇ 80) display luminances by applying a luminance diffusion filter to the control data of the (32 ⁇ 16) area. Including first backlight luminance distribution data is obtained. By applying a correction filter to the first backlight luminance distribution data and further performing linear interpolation processing, second backlight luminance distribution data including (7860 ⁇ 4320) display luminances, that is, luminance distribution data. Is obtained. Finally, display data is obtained by dividing the luminance of the pixels included in the input image by the display luminance included in the luminance distribution data.
  • the number of pixels included in the input image input to each of the first video processing unit 10 and the second video processing unit 20 is (3840 ⁇ 4320).
  • the size of the display data obtained in each of the first video processing unit 10 and the second video processing unit 20 is also (3840 ⁇ 4320).
  • the reduced image obtained by the sub-sampling process is not limited to one including the luminance of (160 ⁇ 160) pixels.
  • the first backlight luminance distribution data is not limited to one including (160 ⁇ 80) display luminances.
  • FIG. 6 is a figure which shows an example of an input image
  • FIG. 6B is a diagram illustrating the first area of the input video.
  • FIG. 6C is a diagram illustrating the control data calculated by the control data calculation unit 11.
  • FIG. 6D is a diagram illustrating the second area of the input video.
  • (E) of FIG. 6 is a figure which shows the control data which the control data calculation part 21 calculates.
  • FIG. 6F is a diagram showing the diffusion of the luminance of the LED.
  • FIG. 6G shows luminance distribution data based only on the luminance of the LEDs in the first region.
  • FIG. 6H shows luminance distribution data based only on the luminance of the LEDs in the second region.
  • control data calculation unit 11 calculates control data for controlling the luminance of the LED to be low in the entire first region of the backlight 110.
  • the control data calculation unit 21 calculates control data for controlling the luminance of the LED to be high in the area corresponding to the bright area in the second area of the backlight 110. .
  • the first video processing unit 10 calculates luminance distribution data based only on the control data of the first region. .
  • the second video processing unit 20 calculates luminance distribution data based only on the control data of the second area. Therefore, as shown in FIGS. 6F and 6G, in the luminance distribution data, there is no bright area in the first area, and there is a bright area only in the second area.
  • the luminance of the LED light diffuses not only in the area corresponding to the LED but also in the surrounding area.
  • the luminance distribution data calculated in the display device of the comparative example is luminance distribution data with low accuracy in which this region does not exist.
  • control data is transmitted and received between the first video processing unit 10 and the second video processing unit 20.
  • the luminance distribution data including the influence of the control data of the second area is also calculated in the first video processing unit 10.
  • a high luminance region due to the LED in the second region of the backlight appears in the first region of the luminance distribution data. Therefore, according to the display device 1, the accuracy of the luminance distribution data is improved. Furthermore, the accuracy of local dimming can be improved by calculating display data using the luminance distribution data.
  • the display data calculation units 14 and 24 calculate display data based on the luminance distribution of the area of the backlight 110 corresponding to the entire input video. For this reason, the display data calculation units 14 and 24 not only include the brightness of the LEDs included in the area to be processed, but also the brightness of the area that is not included in the area to be processed. Luminance distribution data is calculated with reference to the luminance of the LED that affects the distribution. Therefore, according to the display device 1, the accuracy of local dimming is improved.
  • the display panel 109 and the backlight 110 may be separate devices.
  • elements other than the display panel 109 and the backlight 110 specifically, devices including the first video processing unit 10, the second video processing unit 20, and the like are video processing devices. Become.
  • first video processing unit 10 and the second video processing unit 20 may perform processing such as color tone correction and increase or decrease of the frame rate in addition to the above-described local dimming processing.
  • FIG. 7 is a block diagram showing a configuration of the display device 2 according to the present embodiment.
  • the display device 2 is different from the display device 1 in that the divided area of the backlight 110 is divided into a first set 110A and a second set 110B.
  • 110 A of 1st sets are located in the area
  • the second set 110B is located in an area of the backlight 110 corresponding to areas C and D in the input video.
  • the backlight 110 includes a first luminance control circuit 111A and a second luminance control circuit 111B that control the luminance of the divided areas included in each of the first set 110A and the second set 110B. That is, the first luminance control circuit 111A drives the LEDs arranged in the upper half area of the backlight 110. The second luminance control circuit 111B drives the LEDs arranged in the lower half area of the backlight 110.
  • the first video processing unit 10 performs video processing on the left half area of the backlight 110 (area corresponding to the input video areas A and C).
  • the second video processing unit 20 performs video processing on the right half area of the backlight 110 (area corresponding to the areas B and D of the input video). Further, the first video processing unit 10 and the second video processing unit 20 transmit / receive control data to / from each other.
  • the first video processing unit 10 transmits control data corresponding to the divided areas to be controlled to the first luminance control circuit 111A and the second luminance control circuit 111B.
  • the second video processing unit 20 transmits control data corresponding to each divided area to be controlled to the first luminance control circuit 111A and the second luminance control circuit 111B.
  • the divided area of the backlight 110 (area corresponding to the areas A and B) controlled by the control data transmitted by the first video processing unit 10, and the first video processing unit 10.
  • the divided areas of the backlight 110 (areas corresponding to areas A and C) corresponding to the partial video area to be processed are different from each other.
  • the divided areas of the backlight 110 corresponding to are different from each other.
  • the display device 2 is a display device having such a power supply configuration or a substrate configuration, and the backlight 110 is vertically divided.
  • the video processing apparatus according to the present disclosure can also be applied to such a display apparatus 2.
  • a power source 115 is a power supply substrate that supplies power to the display device.
  • FIG. 8 (A) of FIG. 8 is a figure which shows the example of a board
  • FIG. 8A a single luminance control circuit 111 is provided near the center of the display device 1.
  • the luminance control circuit 111 needs to be designed differently from the example shown in FIG.
  • FIG. 8B shows the structure of the display apparatus 1A which is an example of the display apparatus in the case of increasing the number of divided areas of the backlight 110.
  • the size of the luminance control circuit 111 itself is expanded.
  • the luminance control circuit 111 can be designed optimally according to the number of divided areas of the display device 1A.
  • FIG. 8C is a figure which shows the example of a board
  • FIG. 8C the first luminance control circuit 111A and the second luminance control circuit 111B control the upper half and the lower half of the backlight, respectively.
  • the manufacturing cost of the display device 2 is reduced compared to the manufacturing cost of the display device 1A. .
  • FIG. 8 is a figure which shows the example of board
  • FIG. The display device 2A is different from the display device 2 in that it includes a third luminance control circuit 111C and a fourth luminance control circuit 111D instead of the first luminance control circuit 111A and the second luminance control circuit 111B.
  • the third luminance control circuit 111C and the fourth luminance control circuit 111D control the LEDs included in the respective divided areas obtained by dividing the backlight 110 into left and right.
  • the advantages of the display device 2A over the display device 1A are substantially the same as the advantages of the display device 2.
  • FIG. 9 is a figure which shows the example of the wiring in an example of 2 A of display apparatuses.
  • the backlight of the display device 2A has a configuration in which eight LED boards 112A to 112H are arranged in two vertical rows and four horizontal rows.
  • the LED substrates 112A to 112D are positioned on the left side of the display device 2A, and the LED substrates 112E to 112H are positioned on the right side of the display device 2A.
  • the LED boards 112A to 112H include input terminals 113A to 113H to which signal lines from the third luminance control circuit 111C or the fourth luminance control circuit 111D are input at positions corresponding to the upper end or the lower end of the display device 2A. .
  • FIG. 9B is a diagram showing an example of wiring in another example of the display device 2A.
  • the backlight of the display device 2A has a configuration in which eight LED boards 114A to 114H are arranged in a horizontal row.
  • the LED substrates 114A to 114D are located on the left side of the display device 2A, and the LED substrates 114E to 114H are located on the right side of the display device 2A.
  • the LED boards 114A to 114H include input terminals 115A to 115H to which signal lines from the third luminance control circuit 111C or the fourth luminance control circuit 111D are input at positions corresponding to the lower end of the display device 2A.
  • the wiring from the third luminance control circuit 111C or the fourth luminance control circuit 111D to the input terminals 113A to 113H or 115A to 115H is indicated by thick arrows.
  • the third luminance control circuit 111C or the fourth luminance control circuit 111D is not arranged on the left and right, as shown in FIGS. 9A and 9B, the third luminance control circuit 111C or the fourth luminance control circuit 111D
  • the wiring easily interferes with other substrates (the first video processing unit 10, the second video processing unit 20, the TCONs 107 and 108, the other of the third luminance control circuit 111C or the fourth luminance control circuit 111D, and the power supply 115). .
  • FIG. 10 is a diagram showing a configuration of the display device 3 according to the present embodiment.
  • the display device 3 is different in that it includes a first video processing unit 10 ⁇ / b> A and a second video processing unit 20 ⁇ / b> A instead of the first video processing unit 10 and the second video processing unit 20.
  • the first video processing unit 10A and the second video processing unit 20A include transmission / reception control units 15 and 25 in addition to the configurations of the first video processing unit 10 and the second video processing unit 20, respectively.
  • the transmission / reception control units 15 and 25 control transmission / reception of control data by the first video processing unit 10A and the second video processing unit 20A, respectively.
  • the first video processing unit 10A and the second video processing unit 20A transmit / receive control data to / from each other via the transmission / reception control units 15 and 25, respectively.
  • Such a display device 3 has the same effect as the display device 1.
  • FIG. 11 is a diagram illustrating a configuration of a main part of the display device 4 according to the present embodiment. As shown in FIG. 11, the display device 4 further includes a third video processing unit 30 and a fourth video processing unit 40 in addition to the configuration of the display device 1.
  • each of the first video processing unit 10 to the fourth video processing unit 40 performs video for each of the areas A to D (that is, each of 4K video obtained by dividing the 8K video as input video into four). Process. At this time, each of the first video processing unit 10 to the fourth video processing unit 40 transmits / receives control data to / from each other. As a result, each of the first video processing unit 10 to the fourth video processing unit 40 calculates the luminance distribution data based on the control data for controlling all the divided areas of the backlight 110. Therefore, the accuracy of local dimming is improved as compared with the case where each of the first video processing unit 10 to the fourth video processing unit 40 does not transmit / receive control data to / from each other.
  • the first video processing unit 10 transmits control data for controlling all of the divided areas of the backlight 110 to the luminance control circuit 111. For this reason, the structure for integrating the control data of a plurality of video processing units is unnecessary.
  • each of the first video processing unit 10 to the fourth video processing unit 40 transmits / receives control data to / from each other.
  • the first video processing unit 10 to the fourth video processing unit 40 may transmit and receive control data so that each acquires control data for all of the divided areas of the backlight 110.
  • the first video processing unit 10 receives control data from each of the second video processing unit 20 to the fourth video processing unit 40, and then controls each of the second video processing unit 20 to the fourth video processing unit 40. Data may be sent.
  • the first video processing unit 10 transmits and receives control data to and from all of the second video processing unit 20 to the fourth video processing unit 40, but the second video processing unit 20 to the fourth video processing unit. 40 transmits / receives control data only to / from the first video processing unit 10.
  • the display device 4 including the four video processing units (the first video processing unit 10 to the fourth video processing unit 40) is also included in the embodiment of the present disclosure. Furthermore, the display device according to an aspect of the present disclosure may include a different number of video processing units from both two and four.
  • FIG. 12 is a diagram showing a configuration of a main part of the display device 5 according to the present embodiment. As shown in FIG. 12, the display device 5 includes a first video processing unit 10 to a fourth video processing unit 40 as in the configuration of the display device 4.
  • the display device 5 includes a luminance control circuit corresponding to each of the regions obtained by dividing the backlight 110 into two parts, similarly to the display device 2. In this case, (i) any one of the first video processing unit 10 and the second video processing unit 20, and (ii) any one of the third video processing unit 30 and the fourth video processing unit 40, Control data is transmitted to each of the two luminance control circuits.
  • a display device 5 is also included in one aspect of the present disclosure.
  • each of the first video processing unit 10 to the fourth video processing unit 40 also has control data corresponding to all of the divided regions of the output video in the display device 5. It is preferable to obtain.
  • FIG. 13 is a diagram illustrating a configuration of a main part of the display device 6 according to the present embodiment. As shown in FIG. 13, the display device 6 includes a first video processing unit 10 to a fourth video processing unit 40 as in the configuration of the display device 4.
  • the display device 6 includes two luminance control circuits corresponding to each of the regions obtained by dividing the backlight 110 into two. In this case, (i) any one of the first video processing unit 10 and the third video processing unit 30, and (ii) any one of the second video processing unit 20 and the fourth video processing unit 40, Control data is transmitted to each of the two luminance control circuits.
  • each of the first video processing unit 10 to the fourth video processing unit 40 receives control data corresponding to all of the divided areas of the output video. It is preferable to obtain.
  • Control blocks of the display device 1 and the like may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by software.
  • the display device 1 or the like is provided with a computer that executes instructions of a program that is software for realizing each function.
  • the computer includes, for example, at least one processor (control device) and at least one computer-readable recording medium storing the program.
  • the processor reads the program from the recording medium and executes the program, thereby achieving the object of the present disclosure.
  • a CPU Central Processing Unit
  • the recording medium a “non-temporary tangible medium” such as a ROM (Read Only Memory), a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used.
  • a RAM Random Access Memory
  • the program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program.
  • an arbitrary transmission medium such as a communication network or a broadcast wave
  • one aspect of the present disclosure can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

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Abstract

La présente invention concerne un dispositif de traitement d'image capable de réduire les coûts de production. L'invention concerne un dispositif d'affichage équipé d'une première unité de traitement d'image (10) pour soumettre une région d'image partielle à un traitement d'image. La première unité de traitement d'image transmet des données de commande pour commander une région divisée d'un rétroéclairage (110) vers le rétroéclairage, et la région divisée de rétroéclairage qui est commandée par les données de commande transmises par la première unité de traitement d'image et la région divisée de rétroéclairage qui correspond à la région d'image partielle devant être traitée par la première unité de traitement d'image sont différentes l'une de l'autre.
PCT/JP2019/007131 2018-02-26 2019-02-25 Dispositif de traitement d'image, dispositif d'affichage, procédé de traitement d'image, programme et support d'enregistrement WO2019163999A1 (fr)

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CN201980012417.0A CN111801724A (zh) 2018-02-26 2019-02-25 影像处理装置、显示装置、影像处理方法、程序以及记录介质
US16/968,997 US20210027724A1 (en) 2018-02-26 2019-02-25 Video processer, display device, method of video processing, and recording medium
JP2020501090A JPWO2019163999A1 (ja) 2018-02-26 2019-02-25 映像処理装置、表示装置、映像処理方法、プログラムおよび記録媒体

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KR20230099953A (ko) * 2021-12-28 2023-07-05 엘지디스플레이 주식회사 표시 장치
CN117935739A (zh) * 2022-10-13 2024-04-26 新加坡商群丰骏科技股份有限公司 显示设备以及用于显示设备的背光控制方法

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